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But in mixed convection that the difference between surface temperature and fluid temperature has a role in determining the thickness of boundary layer, and increase of it followed by the increase of buoyancy force which led to higher energy levels between fluid particles near the surface and this will follow the increase in velocity of boundary layer thickness, With increasing non-Newton Richardson number, this certainly leads to increases thickness of boundary layer that confirm the increase of friction coefficient. Figure 5 describing the friction coefficient values by changes of the number of none-dimensional Richardson and Non-Newtonian fluids index.

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If the temperature of the fluid flow and level are different, thermal boundary layer arising from the encounter. Front edge of the temperature profile in the channel has been uniform. Fluid particles are in contact with the surface to reach thermal equilibrium with the surface. Energy exchange between adjacent particles and fluid particles, the fluid temperature gradient is created. Increased number code after Richardson representing the effect of increasing buoyancy force is originated from the increase in surface temperature and temperature difference is increased fluid between the particles in the vicinity of energy level is, this reduction in the boundary layer will follow. Figure 7 in constant temperature boundary conditions, the temperature gradient is increased with increasing Richardson. Therefore, heat transfer rate increases proportional to the temperature gradient. Figure 6 in the constant flux boundary conditions the boundary layer of thickness reduction due to increased influence of Richardson and temperature distribution inside the fluid decreases. The results of reducing the rate of heat transfer surface temperature is higher and the amount of local Nusselt number will increase.

Changes type of fluid from pseudo-plastic to the Newton and Daylatant in the heat transfer compound reduces heat penetration is fluid, which is due to increased shear rate. Average Nusselt is shown by the changes in the Non-Newtonian fluid index and Richardson in Figure 8.

Entropy production occurs due to an irreversible process within the system, this can formed due to internal production processes such as friction, free expansion, internal energy transfer (due to temperature difference) and to foreign irreversible.

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Entropy production process in a way that included all changes velocity and temperature values are in different directions